[PATCH] powerpc: Add I2C bus multiplexer node for B4 and T4240QDS

[Yang,Wei]

On 09/03/2013 03:51 PM, Jia Hongtao wrote:
> In both B4 and T4240QDS platform PCA9547 I2C bus multiplexer is used.

Hi Hongtao,

If you want to support I2C bus multiplexer, for T4 and B4QDS platform, 
since some eeprom devices is connected to PCA9574 I2C bus
multiplexer, so these devices should be connected to pca9547 node. Just 
like the following, what do you think of it?

+                       pca9547 at 77 {
+                               compatible = "philips,pca9547";
+                               reg = <0x77>;
+                               #address-cells = <1>;
+                               #size-cells = <0>;
+                               channel at 0 {
+                                       #address-cells = <1>;
+                                       #size-cells = <0>;
+                                       reg = <0>;
+                                               eeprom at 51 {
+                                                       compatible = 
"at24,24c256";
+                                                       reg = <0x51>;
+                                               };
+                                               eeprom at 52 {
+                                                       compatible = 
"at24,24c256";
+                                                       reg = <0x52>;
+                                               };
+                                               eeprom at 53 {
+                                                       compatible = 
"at24,24c256";
+                                                       reg = <0x53>;
+                                               };
+                                               eeprom at 54 {
+                                                       compatible = 
"at24,24c256";
+                                                       reg = <0x54>;
+                                               };
+                                               eeprom at 55 {
+                                                       compatible = 
"at24,24c256";
+                                                       reg = <0x55>;
+                                               };
+                                               eeprom at 56 {
+                                                       compatible = 
"at24,24c256";
+                                                       reg = <0x56>;
+                                               };
+                                               rtc at 68 {
+                                                       compatible = 
"dallas,ds3232";
+                                                       reg = <0x68>;
+                                                       interrupts = 
<0x1 0x1 0 0>;
+                                               };
+                                       };

Wei
>
> Signed-off-by: Jia Hongtao <hongtao.jia at freescale.com>
> ---
>   arch/powerpc/boot/dts/b4qds.dtsi   | 4 ++++
>   arch/powerpc/boot/dts/t4240qds.dts | 4 ++++
>   2 files changed, 8 insertions(+)
>
> diff --git a/arch/powerpc/boot/dts/b4qds.dtsi b/arch/powerpc/boot/dts/b4qds.dtsi
> index e6d2f8f..2aa3399 100644
> --- a/arch/powerpc/boot/dts/b4qds.dtsi
> +++ b/arch/powerpc/boot/dts/b4qds.dtsi
> @@ -120,6 +120,10 @@
>   		};
>   
>   		i2c at 118000 {
> +			pca9547 at 77 {
> +				compatible = "philips,pca9547";
> +				reg = <0x77>;
> +			};
>   			eeprom at 50 {
>   				compatible = "at24,24c64";
>   				reg = <0x50>;
> diff --git a/arch/powerpc/boot/dts/t4240qds.dts b/arch/powerpc/boot/dts/t4240qds.dts
> index 0555976..084db57 100644
> --- a/arch/powerpc/boot/dts/t4240qds.dts
> +++ b/arch/powerpc/boot/dts/t4240qds.dts
> @@ -118,6 +118,10 @@
>   		};
>   
>   		i2c at 118000 {
> +			pca9547 at 77 {
> +				compatible = "philips,pca9547";
> +				reg = <0x77>;
> +			};
>   			eeprom at 51 {
>   				compatible = "at24,24c256";
>   				reg = <0x51>;